So in our never ending quest to find free mods, Hyundai has yet again kicked butt and deciced to give us an adjustable wastegate actuator. What this does is allow us to change the preload on the wastegate itself, which will allow the car to hold more boost. I was a bit doubtful that it would work on our cars because of the more sophisticated ECUs...i was worried it would still do whatever it needed to do to maintain target boost and thus net no gain. So far so good though, car immediately held more boost and gained torque. Unfortunately the dyno guys didnt have the boost sensor hooked up so we could see the actual before and after psi difference, but the dyno definitely speaks. There is definitely a spike in there but i think that is just from us not resetting the ECU and not giving the car anytime to learn. Hopefully once it learns it will smooth it out.
On to the HowTo
1. Remove Turbo heat shield (3) 10mm Bolts
2. Loosen the 10mm Nut that locks the end of the wastegate actuator arm. Back it up to about the end of the threads.
3. Take off the "C-Clip" with a pliers. Be careful and this will like to fly off while you are taking it off and you dont want to lose this.
4. Lift the "swivel bracket" off of the wastegate flapper door bracket. This is the part that we will be turning to shorten the overall length of the wastegate actuator arm.
5. Turn the "swivel bracket" clockwise, as if you were sitting behind the turbo looking at the front of the car. We turned it 2.5 complete turns but i would suggest turning 1.5 times or so and see how the car responds.
6. Place "Swivel bracket" back on wastegate flapper door bracket.
7. Replace "C-Clip".
8. Tighten 10mm Nut.
9. Replace turbo heat sheild (3) 10mm Bolts.
And on to the results. This is OEM vs. OEM w/ wastegate arm adjustment. Literally taken 10 minutes apart.